PandasdrillNamed aggregations
A pandas exercise from Pandasdrill. Solve it with a Python editor in your browser running real pandas, and it is checked the moment you submit.
The task
For each region, return a DataFrame with three columns: `total_revenue` (sum of revenue), `orders` (number of orders) and `avg_units` (mean units). Index by region.
What this exercise teaches
Named aggregation lets you pick the source column, the function and the output name in one place. Each keyword becomes a column of the result, in the order you write them.
A hint if you get stuck
agg accepts keyword arguments in the form new_name=("column", "function").
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